Tire or other valve.



- PATENTED MAY 21, 1907. M. G. SGHWEINERT dz H. P. KRAFT.

TIRE OR OTHER VALVE.

APPLICATION FILED SEPT. 5, 1905.

FIG. 2.

WITNESSES:

UNITED STAT S PATENT 'orrron.

MAXIMILIAN CHARLES SCHWEINERT, oF- WEST HOBOKEN, NEW JERSEY,

AND HENRY'P. KRAFT, or. NEW YORK, N. Y.

Y TIRE OR OTHER VALVE.

Specification of Letters Patent;

Patented May, 21, 1907.

Application filed September a, 1905.. BerinI'No. 277,052.

improved construction which wil prevent the displacement of a packingring, and which has other advantages referred to in detail hereinafter.

The accompanying drawings illustrate embodiments of the invention.

Figure 1 is a diametral section of a valve, showing the internal partsin elevation. Fig. 2 is a section through the seat member of the valve,in process of construction. ,Fig. 3 is a section through the seat membercompleted. Fig. 4 is a horizontal section illustrating the method ofconstruction. Figs. 5 and 6 are sections through the seat member,illustrating alternative constructions.

Referring to the embodiments illustrated, the valve comprises a shell A,a seat member B, a plug C carrying the seat member and screwing into asocket at the upper end of the shell, a valve stem D projecting aboveand below the valve proper E, a closing spring F, a spring holder G, apacking ring H making an air tight joint between the seat member B andthe shellA. In general these parts may be of any usual or suitable con-.

struction and operation, the internal parts shown being adapted to beinse'rtedin or removedfrom the shell at will by screwing in or out theplug C, which, for this purpose, is provided with a screw-driver rib onits top adapted to be engaged by a complementary provision on the cap;these parts being, generally speaking, all old and well understood inthe art. It is to be understood that the improvement is alsoapplicableto other types of valve.

There is sometimes a'tendency of the packing ring H to stick to the Wallof the casing and to be stripped from its groove by thecarrying thepacking ring H always with the seat member, it is proposed to compressthe packing ring or a portion thereof against the periphery of themember, preferably by means of a ring surrounding a portion of thepacking ring and contracted thereon.

Ordinarily the member B is provided with a groove extendin around ltsperiphery, having an'inner wal J, an upper wall K, and a lower wall L,the walls K and L being designed to prevent longitudinal.movement of thepacking ring upon the seat member, and the lower wall L servingespecially to prevent the pack' g ring bein drawn over the lower end oft e seat mem er when the latter is pulledout of the valve shell; It isfound, owever, in practice that the packing ring occasionally adheres sofirmly'to the shell as to slip over the wall L and the lower end of theseat member, thus falling into the valve and interfering with itsoperation. By placing the packing ring in a groove, and in additionproviding means overlying the periph- L of the groove.

' Fig. 2 shows the packing ring H in the groove and the ring M beforeuse of a diameter sufficient to permit it to pass over the lowershoulder of the groove and over the lower portion of the packing. Afterbeing introuced upon the lower portion of the packing ring the ring isthen contracted as shown in Fig. 3, so that it holds the lower portion Nof the packing ring, which I desi mate as a whole by the'letter H,frictiona ly against the bottom J of the groove, and also revents theexpansion of the portion N of t 1e packing ring sufficiently to passover the wall or shoulder L. The ring M also is preferably contracted tosuch a diameter that itcannot 'pass over the shoulder L. Any suitablethan its upper portion before use, so that sufiiciently to pass over thewall or shoulder when the ring M is contracted it will not squeeze anddistort the-packing ring H. It will nevertheless hold it firmly inplace. Various other devices for overlying and preferably alsocompressing the packing ring may be substituted for the separate metalring M. For example, Fig? 6 shows a ring M constituted by an upwardlyextending edge of the lower portion of the seat member. This mayconveniently be swaged up against the rubber so as to overlie anyportion there of and to press it with any desired pressure against theinner wall J of the groove. or,

instead of being a continuous ring M, it may be a series of teeth. Theprovision of an up wardly-extending edge of the lower portion of theseat member, however, is not specifically claimed herein, being claimedin a copending application, Serial No. 277,053 filed September 5, 1905.

Though we have described with great particularity of detail certainspecific embodiments of our invention, yet it is not to be understoodtherefrom that the invention is limited to the particular embodimentsillustrated.

Various modifications in detail, and in the arrangement and combinationof the parts may be made by those skilled in the art without departurefrom the invention.

What we claim is 1. In a valve for tires or the like, a packing ring, amember having a peripheral, groove therefor, and a ring surrounding saidpacking ring to prevent its expansion over a side wall of the groove,the inner diameter of said ring 'being less than the outer diameter ofsaid wall, whereby the ring is also retained.

2. In a valve for tires or the like, a seat member B having a peripheralgroove, a 40 packing ring II in said groove, and ametal ring Msurrounding said packing ring and contracted thereon to a diameter lessthan that of the adjacent shoulder of said groove.

3. In a valve for tires or the like, a member having a peripheralgroove, a surround ing casing, a packing ring in said groove andextending laterally beyond the member on which it is carried, so thatits periphery is adapted to engage the surrounding casing to close thespace between such casing and saidadapted to engage the'surroundingcasing to close the space between such casing and said member, and meansoverlying a portion of said ring to prevent it from'being stripped fromsaid member by a strain in an axial direction.

In witness whereof, we have hereunto signed our names in the presence oftwo subscribing witnesses.

MAXIMILIAN' CHARLES SCHWEINERT. HENRY P. KRAFT.

Witnesses:

DOMINGO A. USINA, FRED WHITE.

